<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        function Apple(name, type, blood) {
            this.myName = name;
            this.myType = type;
            this.myBlood = blood;
        }
        var red = new Apple('red apple', 'redpi', '10000000');
        for (var k in red) {
            console.log(k); // k是属性名
            console.log(red[k]);
        }
    </script>
</head>

<body>

</body>

</html>